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  3. Exercise is good for you. But most people really know very little about how to exercise. Look at the following true-false tests.

Exercise is good for you. But most people really know very little about how to exercise. Look at the following true-false tests.

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问题     Exercise is good for you. But most people really know very little about how to exercise. Look at the following true-false tests. You will be surprised! The best way to reduce the mid-section is to do abdominal exercise. False. Many people believe that when specific muscles are exercised, the fatty tissues in the immediate area are "burned up". The truth is that exercise burns fat from all over the body and not from one specific area, regardless of the type of exercise. Of course, if you reduce the fat throughout your body, you will certainly see results around your waistline too!
    To maintain an adequate level of physical fitness, you need to exercise only twice a week.
    False. Studies conducted by NASA, the National Aeronautics and Space Administration, show that unexercised muscles lose their strength very quickly. After 48 to 72 hours, you must use the muscles again to re-establish the good physical effects.
    To lose weight you should always "work up a good sweat" when exercising.
    False. Sweating only lowers body temperature to prevent overheating; it does not help you reduce. You may weigh less immediate after a workout, but this is due to water loss. Once you replace the liquid, you replace the weight.
    You burn more calories jogging one mile than walking the same distance.
    False. You use the same amount of energy whether you walk or jog the mile, since in both cases you are moving the same weight the same distance. The speed doesn’t matter. Of course, if you jog rather than walk for 30 minutes, you’ll cover more distance, and therefore burn more calories.
    If your breathing doesn’t return to normal within minutes after you finish exercising, you’ ve exercised too much.
    True. Five minutes or so after exercising, your breathing should be normal, your heart shouldn’t be pounding, and you shouldn’t be exhausted. Beneficial exercise is not overly difficult, unpleasant, and refreshing.
    Walking is one of the best exercises.
    True. Walking helps circulation of blood through-out the body, and thus has a direct effect on your overall feeling.
    Vigorous stretching exercises keep muscles flexible.
    False. Stretching exercises(for example: twisting or bending at the waist, touching your toes)should be done slowly, allowing the muscles to relax and "let go". Vigorous stretching makes the muscles tighter.
    The minimum amount of time you should spend exercising in a day is 20 minutes.
    True. There are more than 400 muscles that attach to your skeleton. A good exercise routine should contract and stretch all these muscles, and this simply cannot be done with four or five exercises in five or ten minutes. From experience, I’ve found that about 20 minutes is the minimum amount of time needed for an adequate workout.
Which of the following exercising notion is true?
选项 A、Doing abdominal exercise to reduce the mid-section.
B、More sweat in your body, more weight you lose.
C、Exercising only twice a week can keep you fit.
D、Exercise at least for 20 minutes one day.
答案D
解析 细节题。A项意为“做腹部运动可以减腹部肥肉”，根据文章第二段和第三段可知，这一运动理念错误；B项指的是“出汗越多人越瘦”，根据文章第六段、第七段可知，该理念错误；C项意为“一周只锻炼两次就可以保持身体健康”，根据文章第三、第四段可知，该观点错误；D项意为“一天至少应该锻炼20分钟”，这在文章最后两段可找到依据。故D项正确。
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